FORMER MasterChef host Sarah Wilson has caused widespread outrage after a television appearance this morning in which she appeared to advocate the anti-vaccination movement.

Speaking on Channel 7's Sunrise program about today's news that immunisation rates are dropping in Australia's wealthiest suburbs, the author and TV personality claimed research about the safety and efficacy of vaccines was "not conclusive".

"I'm not going to take a stance on this myself because I don't know fully but the research is not conclusive," she said, to vocal opposition from host David Koch and other panellists Kylie Gillies and Daily Telegraph reporter Caroline Marcus.

When challenged by a clearly shocked Koch, Wilson cited claims by the anti-vaccination movement that "the double-blind placebo cross something or other tests" had not been done to prove the safety of immunisation.

"I'm just putting it from the perspective of the anti-vaccination movement's perspective," she said.

"What they say is that the gold standard studies, right, that are done to really absolutely conclusively prove things, the double-blind placebo cross something or other tests have not been done and it's almost impossible to do that on human beings, especially children."

Wilson also claimed that wealthy parents were less likely to vaccinate their children because "they tend to be older and I guess more educated".

"They tend to engage in some of the debates a bit more deeply, as a result they weigh up all the different research and so on," she said.

Wilson's remarks quickly caused a social media storm, with the author this morning hitting back at hundreds of Twitter users flooding her with angry messages.

"Just to remind irate @sunriseon7 viewers going me, I was asked for the arguments anti-vaccine parents cite NOT my personal views," she tweeted.

Wilson later tweeted: "OK, once more with balance: I WAS ASKED 'WHY ARE SOME PARENTS NOT VAXING'. NOT 'ARE YOU ANTI-VAX'. I outlined the argts OTHERS put forward."

However many following the debate were unimpressed, labelling her irresponsible and misinformed.

"Not impressed, Sarah Wilson. It's not unbiased to offer crazy opinions as the other side of the coin, just irresponsible," tweeted one user, while another branded her "ridiculous and irresponsible".